October in Cavan is the cloudiest month of the year. In October, the weather in Cavan is typically warm. Average daily high temperature in October is about 13 degrees above zero. On average, Cavan has 16 rainy, 8 partly cloudy, and 7 cloudy days in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Cavan.